Yeah I'm really looking forward to another release of SlumpEd, It's by far superior to XWE and the only WAD editor I use. A couple feature suggestions though ;)
1. Search for LUMP feature and a search for TEXT within a lump
2. Perhaps add support for playing more sound formats(ogg?)
3. Filter Lumps(sounds, music, other, markers, maps, sprites, flats.... so on)
And of course, the stuff in the future on the SlumpEd site(merging wads, wad to pk3... so on)
And here are some crazy pie ones:
1. Sprite Editor, with maybe a recoloring tool.
2. ACS/DECORATE Compiler
3. Simple Map Editor?(not the program, just a simple one :P)
Sorry about the huge bump, But I can't stand to see this program go inactive!